concaver凹面体
concaveadj.凹的n.凹面;凹线;凹形
concave curvature凹曲度
Concave deformity凹陷畸形
concave clearance凹板间隙
concave collector凹形接电器
concave rim wheel槽缘轮
concave landforms凹形地貌
concave refractor上凹折射层
concaved printing凹版印刷
concave head bolt凹头螺栓
concave-concaveadj.双凹的;两面凹的